What am I to think, he might say, of my own father and mother?
They are familiarly known to me.
I have seen them, and talked with, them, and loved them as my own soul.
I have hitherto believed that they existed, and that they were really a father and mother to me.

But now I am taught that they are--mere modifications of my own mind; that they are nothing more than simple phenomena of the self-conscious Ego; and that, so far from being the earthly authors of my existence, they are themselves--the creation and offspring of my own thought.

And on what ground am I asked to receive this astonishing discovery?
Why, simply because I can be sure of nothing but the facts of consciousness.

But how are _these facts proved_?
They "need no proof; they are self-evident; they are immediately and irresistibly believed." Be it so.

I can just as little doubt of the existence of my body, of the distinct personality of my parents, and the reality of an external universe, as of any fact of consciousness.